After our 3rd Tier 1 win (checking Expedition Information, it looks to be Zeixshi-Kar's Shard [we did 1 tier 1 then 2 tier 2's that day] but may include The Madness of King Tormax), the following items were available:

156 items. We had done the raids Shard's Landing - Calling Phantasm and Cavern's of Fear: Danela's Stand yesterday so I don't know when it opened this many items. I suspect all these items were available after the first raid since many items are All / All. The list is EQ Item Collector Number : Item Name : Velium Shards to buy